Radio link control (RLC) enhancements for multicast and broadcast services
A system, method and apparatus for wireless communications is provided. A user equipment (UE) receives control information including first configuration parameters and second configuration parameters. The UE receives a packet associated with the MBS radio bearer and determines a decoding result associated with the decoding the received packet. The UE processes a decoding result according to an acknowledgement mode.
1. A method for a user equipment (UE) for multicast and broadcast services (MBS) data reception, comprising:
receiving, from a base station, one or more radio resource control (RRC) messages including one or more first configuration parameters of a MBS radio bearer, one or more second configuration parameters of a first radio link control (RLC) entity associated with the MBS radio bearer, and one or more third configuration parameters of a second RLC entity associated with a unicast service bearer, wherein the first RLC entity and the second RLC entity are associated with a same unicast scheduling for the UE in a medium access control (MAC) entity;
receiving, from the base station, a packet associated with the MBS radio bearer at the first RLC entity, wherein the packet associated with the MBS radio bearer is demultiplexed with a packet associated with the unicast service bearer at the MAC entity;
transmitting, to the base station, a status protocol data unit (PDU) comprising a negative acknowledgement (NACK) in response to the packet associated with the MBS radio bearer not being received; and
receiving the packet associated with the MBS radio bearer retransmitted from the base station at the first RLC entity.
2. The method of claim 1 , wherein the first RLC entity is an acknowledged mode (AM) RLC entity.
3. The method of claim 1 , wherein the second RLC entity is an AM RLC entity.
4. The method of claim 1 , further comprising:
synchronizing the first RLC entity and the second RLC entity.
5. The method of claim 4 , wherein the synchronizing the first RLC entity and the second RLC entity comprises synchronizing one or more RLC sequence numbers at the first RLC entity and the second RLC entity.
6. The method of claim 1 , wherein the status PDU further comprises a sequence number.
7. A method for a base station for multicast and broadcast services (MBS) data transmission, comprising:
transmitting, to a user equipment (UE), one or more radio resource control (RRC) messages including one or more first configuration parameters of a MBS radio bearer, one or more second configuration parameters of a first radio link control (RLC) entity associated with the MBS radio bearer, and one or more third configuration parameters of a second RLC entity associated with a unicast service bearer, wherein the first RLC entity and the second RLC entity are associated with a same unicast scheduling for the UE in a medium access control (MAC) entity;
transmitting, to the UE, a packet associated with the MBS radio bearer at the first RLC entity, wherein the packet associated with the MBS radio bearer is multiplexed with a packet associated with the unicast service bearer at the MAC entity;
receiving, from the UE, a status protocol data unit (PDU) comprising a negative acknowledgement (NACK) indicating the packet associated with the MBS radio bearer not being received at the UE; and
performing a retransmission of the packet associated with the MBS radio bearer at the first RLC entity.
8. The method of claim 7 , wherein the first RLC entity is an acknowledged mode (AM) RLC entity.
9. The method of claim 7 , wherein the second RLC entity is an AM RLC entity.
10. The method of claim 7 , further comprising:
synchronizing the first RLC entity and the second RLC entity.
11. The method of claim 10 , wherein the synchronizing the first RLC entity and the second RLC entity comprises synchronizing one or more RLC sequence numbers at the first RLC entity and the second RLC entity.
12. The method of claim 7 , wherein the status PDU further comprises a sequence number.
13. A user equipment (UE), comprising:
at least one antenna for use in transmission and reception of one or more electromagnetic signals;
a processor configured to:
receive, from a base station, one or more radio resource control (RRC) messages including one or more first configuration parameters of a MBS radio bearer, one or more second configuration parameters of a first radio link control (RLC) entity associated with the MBS radio bearer, and one or more third configuration parameters of a second RLC entity associated with a unicast service bearer, wherein the first RLC entity and the second RLC entity are associated with a same unicast scheduling for the UE in a medium access control (MAC) entity;
receive, from the base station, a packet associated with the MBS radio bearer at the first RLC entity, wherein the packet associated with the MBS radio bearer is demultiplexed with a packet associated with the unicast service bearer at the MAC entity;
transmit, to the base station, a status protocol data unit (PDU) comprising a negative acknowledgement (NACK) in response to the packet associated with the MBS radio bearer not being received; and
receive the packet associated with the MBS radio bearer retransmitted from the base station at the first RLC entity.
14. The UE of claim 13 , wherein the first RLC entity is an acknowledged mode (AM) RLC entity.
15. The UE of claim 13 , wherein the second RLC entity is an AM RLC entity.
16. The UE of claim 13 , wherein the processor is further configured to:
synchronize the first RLC entity and the second RLC entity.
17. The UE of claim 16 , wherein the synchronizing the first RLC entity and the second RLC entity comprises synchronizing RLC sequence numbers at the first RLC entity and the second RLC entity.
18. The UE of claim 13 , wherein the status PDU further comprises a sequence number.
19. A base station for a wireless communication, comprising:
at least one antenna for use in transmission and reception of one or more electromagnetic signals;
a processor configured to:
transmit, to a user equipment (UE), one or more radio resource control (RRC) messages including one or more first configuration parameters of a multicast and broadcast services (MBS) radio bearer, one or more second configuration parameters of a first radio link control (RLC) entity associated with the MBS radio bearer, and one or more third configuration parameters of a second RLC entity associated with a unicast service bearer, wherein the first RLC entity and the second RLC entity are associated with a same unicast scheduling for the UE in a medium access control (MAC) entity;
transmit, to the UE, a packet associated with the MBS radio bearer at the first RLC entity, wherein the packet associated with the MBS radio bearer is multiplexed with a packet associated with the unicast service bearer at the MAC entity;
receive, from the UE, a status protocol data unit (PDU) comprising a negative acknowledgement (NACK) indicating the packet associated with the MBS radio bearer not being received at the UE; and
perform a retransmission of the packet associated with the MBS radio bearer at the first RLC entity.
20. The base station of claim 19 , wherein the first RLC entity is an acknowledged mode (AM) RLC entity.
21. The base station of claim 19 , wherein the second RLC entity is an AM RLC entity.
22. The base station of claim 19 , wherein the processor is further configured to:
synchronize the first RLC entity and the second RLC entity.
23. The base station of claim 22 , wherein the synchronizing the first RLC entity and the second RLC entity comprises synchronizing one or more RLC sequence numbers at the first RLC entity and the second RLC entity.
24. The base station of claim 19 , wherein the status PDU further comprises a sequence number.